Impact of parton distribution function and alphas uncertainties on Higgs boson production in gluon fusion at hadron colliders
Articolo
Data di Pubblicazione:
2010
Citazione:
Impact of parton distribution function and alphas uncertainties on Higgs boson production in gluon fusion at hadron colliders / F. Demartin, S. Forte, E. Mariani, J. Rojo, A. Vicini. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 82:1(2010), pp. 014002.014002.1-014002.014002.18. [10.1103/PhysRevD.82.014002]
Abstract:
We present a systematic study of uncertainties due to parton distributions (PDFs) and the strong coupling on the gluon-fusion production cross section of the standard model Higgs at the Tevatron and LHC colliders. We compare procedures and results when three recent sets of PDFs are used, CTEQ6.6, MSTW08, and NNPDF1.2, and we discuss specifically the way PDF and strong coupling uncertainties are combined. We find that results obtained from different PDF sets are in reasonable agreement if a common value of the strong coupling is adopted. We show that the addition in quadrature of PDF and αs uncertainties provides an adequate approximation to the full result with exact error propagation. We discuss a simple recipe to determine a conservative PDF+αs uncertainty from available global parton sets, and we use it to estimate this uncertainty on the given process to be about 10% at the Tevatron and 5% at the LHC for a light Higgs.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
F. Demartin, S. Forte, E. Mariani, J. Rojo, A. Vicini
Link alla scheda completa: